Burglar-alarm.



No. 834,736. PATENTED 001130, 1906.

0, H. JOY. BU-RGLAR ALARM.

APPLIOATION FILED 0017, 1905.

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THE "minis PETIRS co., WASHINGTON.-D. c,

'No. 834,736. PATENTED OCT. 30, 1906.

- o. H. JOY.

BURGLAR ALARM. APPLICATION FILED OCT. 7, 1905.

2 SHBETFSHEET 2.

hVen/arz' Za'ries E Jay.

nu: NORRIS psrzxs ca, WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

JHARLES H. JOY, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO WILLIAM J. DRIVER, OF CHICAGO, ILLINOIS. I

" BURGLAR-ALARM.

Specification of Letters Patent.

Patented Oct. 30, 1906. 4

' Application filed October 7, 1905- Serial No. 281,735.

in the county of Cook and State of Illinois,

have invented certain new and useful Improvements in Bur lar-Alarms, of which the following is a speci cation.

This invention relates to improvements in an: alarm-giving device which is adapted to be attached to a door or the sash of a window in such a manner as to sound an alarm in the movement of either in the operation of opening the same; and it consists in certain peculiarities of the construction, novel arrangements, and operation of the various parts thereof, as will be hereinafter more fully set forth 'and specifically claimed.

The principal object'of the invention is. to provide an alarm of the above-nanied character which shall be simple and inexpensive in construction, strong, durable, and effective.

in operation, and so made that it may be readily secured to the door or window-sash withoutthe use of screws or nails when so desired.

Another object is to provide a burglaralarm which may be adjusted when the door f or window is in its open position and will automatically set itself upon the closing of the door or window, so as to sound an alarm when the same is opened.

A further object is to so construct the parts, 'of the'device that they may be arranged insuch a manner that'the door or window may be opened without giving an alarm. Other objects and advantages of the inven-' tion will be disclosed in the subjoined description and explanation.

In order to enable others skilled in the art to which myinvention pertains to make and use the same, I will now proceed to describe it, referringto the accompanying drawings, in which Figure 1 is a view in elevation of a portion ;of a door and a part of its jamb, showing the alarm secured to the former and the parts in position ready to sound an alarm upon the opening of the door. Fig. 2 is a front view of the alarm, showing it detached. Fig. 3 is a bottom plan view thereof, showing the baseof the casing broken away to illustrate the arrangement of the springs employed for giving the'alarm. Fig. 4 is a similar view with the bottom of the casing and the spring for actuating the alarm ,mechanism removed, but showing the controlling-bar and the spring, for actuating the same. Fig. '5 is a plan view of the casing with the bell removed therefrom and showing the alarm me'chan- I vation of a portion of a window-casing and a part of its sash, showing the alarm mounted on the latter with its parts arranged ready to give an alarm when the sash is raised. Fig. 10 is a fragmental view of the windowframe and the controlling-bar, showing the engaging device for said frame mounted on the bar. Fig. 11 is a detached perspective view of the engagingdevice. Fig.'12 is a plan view of the casing with the bell and alarm mechanism removed, but showing the controlling-bar and striking-hammer in position thereon. Fig. 13 is a plan view of the base or bottom plate of the casing; and Fig. 14 is an enlarged side view thereof, partly in section and partly in elevation, showing the means for securing the alarm to the door or window-sash.

Like numerals of reference refer to corresponding parts throughout the different views of the drawings.

The reference-numeral 2 0 designates a portion of a door and 21 a part of the door-frame. The alarm is secured to the door near its free edge, and the frame has secured thereon the retaining and releasing clip for the controlling-bar of the alarm, which consists of a-cirform and is provided with recesses 28 located diametrically opposite each other for the reception of the projections 26, which may be" ICO turned under the bottom of the base, thus firmly securing it tothe casing. As is clearly shown in Figs.'2, 12,13, and 14, the base27 is provided with outwardly-projecting 'lugs 29' and 30, which are arranged diametrically opposite each other and at right angles 'withre spect to the recesses 28 in the base. The lug 29 is provided on its lower surface with a downwardly and inwardly projecting tooth 31, and the lug 30 is formed with an opening 32., in which is ii'ulcrumeda lever 33, which is provided on its inner portion with one or more downwardly and inwardly projecting. teeth'34, which teeth, as well as the itooth31,

is for the purpose of engaging-thedooror window-sash so as to hold the alarm in ,position' thereon, and it is evident that by raising .the l lever 33 to the position indicated by dottedl lines in Fig. 14 and by pressing the base; against the surface of the dooror window-l sash the tooth 31 will be-causedto pierce thel wood, when byvturning'the lever'down to the: position shown by continuous lines in said} figurethe teeth 341thereon will beforcedinto l the wood, and thus firmly .hold the alarm linl position. Extending loosely and vertically; through the\top'35of thecasingis.a'revoluble spindle-36, -whichalso ,p asses throughra vertical sleeve'37, mountedon the upper surfacel of a,plate-38,which is-used to hold theescapement-wheel 39-andatrain ofi-gears 40 linplace onthe'top-35 and in connection with the spin dle, the upper portion of which is .screw-, threaded and passes through :a central opening inithe 'bell 41 and has secured on itsup- .per'end nuts 42and 43, used for holding the bell in place. within the casing is provided witha proj ecition 44, to which one end of the mainspring 45 -is -connected,.the other end of whichlissecured to a projection 46 on the innersurface ofthecasing, as is-clearly showniin Fig. 3 of the drawings. lP-ivotally secured on the .top of the casing near one ofIits-ends is'anarm 47., whieh-carrieson one-ofitsends ahammer 48, which-is loosely mounted onthe arm 47.and is-adapted to strike the innersur face of the bell. On .theotherend o f the arm 47 is :an anchorpawl 49, which engages the escapement-wheel v39 and controls the movement thereof. Ass hownin Fig. 4, thecontrollingbar is :provided with a long itudinals'lot 50ito receive the spindle 36 :and has on its upper surface a pin 5l, which operatesin a-slot52 in the top of the casing, so .as:to impinge the finner surface of the striking-arm 47 and to holdit against the bell, so.as.to,prevent vibration of the arm. One end Ofillhfi bar 25has fulcrumed thereonacamlever "531to coact withthecasing 22,:so as tohol'd the saidbar inlitsretracted position, as shown'bydotted ilines in Fig. 3, and thus flock .the bar against longitudinal movement. 'The 'bar 25 is ,pro-

'vided near its other end with .a recess 54 forthe purpose of engaging the casing at one That portion ofthe spindle36 end of the slot 23, so as to set said bar and the alarm mechanism.

The retaining and releasing clip 'for the controlling-bar 25 consists oi an apertured plate 55 to be secured to the door, which plate'has-an outwardly-extending portion 56, the upper end of which is provided with a transverse slot 57 for the reception of the front end of the bar 25 under certain conditions. One of the side edges of the portion 56 is provided witha flange 58, which extends inwardly toward the alarm and has a lateral extension 59., which is downwardly inclined at its upper part. The portion 56 has at about its middle a transverse slot 60 for-the operation of apin 61 onua sliding plate-62 located on that surface-ofthe portion 56 adj aeent to the .part 59. The upper portion of the plate 62 is provided witha recess 63, so that when it is slid to the position indicated by-dotted lines in Fig. 7 .the frontend-of the bar 25 may project through the slot '57 one slight movement of the door, thus providing a sai'otyor additionallock forathe door.

When the device :is intended to be used-on a window-sash, the same construction as above described is employed,-except thatlthe retaining and releasing clip is omitted, and the frontend of the .bar 25 has fitted thereon an-engaging device for the windowafranie 64, which consists ofa socketed .m ember 65, havingon-one of its sidesaftoothed dog66, which is ,pivotallysecured .to the member 65, as is clearly shown .in Fig. vl l-of the drawings. The member 65 has on its side opposite the dog 66-aprojection67 tofit in the :recess 54 ofthe bar 25, so-as-toprevent thatedge ofsaid bar catching or engaging the casing, .therebypermitting oi' the .free longitudinal movement of the-bar.

From the foregoingand by reference to the drawings it will be seen and clearly under stood that by turning the .nut 43 on the upper end of the stem 36, the .mainspring 45 will be tightened or wound onsaid stem,.and itmay beiheldinits coiled or tightened position'by means e f-the lever'53 or by means of the shoulder 54 engaging \the casing, which latter engagement will be caused when the door is closed by the inclined .part of .the flange 59 on the retaining+clip, 'for it is :apparent that when the 'bar 25 is retracted and held in the position s'hown'by dotted'lines in .Fig. 3 :bymeans of tllGrlBVGI 53.and the-door is closed the beveled portion of the flange-59 will'force the 'bar 25 to one side, so that the recess 54 Will-engage the casing. In this arrangement of'the parts it is apparontthat the door may be opened andc'losed without giving: an alarm ,but if it is'desired that an alarm s'halllbegiven the lever 53 s'hould be released and thebar 25 disengaged from the casing at its front end, sothat as soon ast'he said end of the'bar'is out o'f engagement with the retaining and releasing clip the bar will'be projected, as shown by continuous lines in Fig. 3, which operation, through the medium of the spring 68 and pin 51, will release the striking-arm 47, thus permitting it to vibrate against the bell. By sliding the plate 62 outwardly, as shown by dotted lines in Fig. 7, it is apparent that as the door is opened the bar 25 may be projected through the slot 57, thus permitting the alarm to be given and at the same time providing a safety-lock for the door. In using the device on a window-sash the same operation is performed, except that the toothed dog 66-will engage the window-frame instead of the retaining-clip as before. It will be understood that the spring 68 is connected at one of its ends to the bar 25 near its rear end and usually by means of the pin -51, and at its other end to that side of the bar opposite the recess therein, and that said spring serves not only to project the bar, but also to actuate it sidewise, so that the recess 54 will engage the casing when the bar is retracted.

' Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

In a burglar-alarm, the combination with a casing having a central opening and provided with diametrically opposite slots in its walls, of a base secured to the bottom of the casing and having outwardly-extending lugs,

one of said lugs having on its lower surface an inwardly and downwardly projecting tooth and the other lug having a'recess, a lever fulcrumed on the recessed lug and having on its inner end a downwardly and inwardly projecting tooth, a spring-actuated controllingbar located in theslots of the casing and projecting at its ends through the same, said bar having a longitudinal and a slight transverse movement and provided near its front end with a shouldered recess to engage the casing, a cam-lever fulcrumed on the other end of the bar, a revoluble spindle or stem mounted in the central opening of the casing, a bell sup ported at the upper portion of the spindle, a mainspring located in the casing and secured at one of its ends to the spindle and at its other end to the wall of the casing, alarm mechanism mounted on the top of the casing within the bell and connected to said s indle, a striking-arm pivoted on the top of t e cas ing and having at one of its ends an anchorpawl to engage a portion of the alarm mechanism, and a hammer loosely mounted on the other end of said arm, substantially as de-- scribed.

CHARLES H. JOY. 

